The Book of Revelation,
according to its opening verses, is a prophecy
addressed to the Church.

Rev 1:3 KJV - [3] Blessed
[is] he that readeth, and they that hear the words of
this prophecy, and keep those things which are
written therein: for the time [is] at hand.

If then as you suppose
the antichrist cannot be revealed to the Church, whom is
John the Revelator speaking to when he, being inspired
by the Spirit, says this?

Rev 13:18 KJV - [18] Here
is wisdom. Let him that hath understanding count
the number of the beast: for it is the number of a MAN;
and his number [is] Six hundred threescore [and] six.

If the number of the
beast (a.k.a. the man, the antichrist) will not be
reckoned by a wise Christian of the Church, to whom the
letter of Revelation is addressed, then who is the wise
NON-Christian with understanding and able to count the
number of the beast?

Now I would agree with you
that some of us may have Mr. Obama wrongly accused of
being THEE antichrist (time will tell) but I am certain
that he is an antichrist by his actions.